EP0681377A3 - Frequency hopping in digital cellular networks - Google Patents
Frequency hopping in digital cellular networks Download PDFInfo
- Publication number
- EP0681377A3 EP0681377A3 EP95302824A EP95302824A EP0681377A3 EP 0681377 A3 EP0681377 A3 EP 0681377A3 EP 95302824 A EP95302824 A EP 95302824A EP 95302824 A EP95302824 A EP 95302824A EP 0681377 A3 EP0681377 A3 EP 0681377A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- microprocessor
- frequency hopping
- memory
- cellular networks
- transceivers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2621—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using frequency division multiple access [FDMA]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
Abstract
Disclosed is a circuit for providing frequency hopping in a Time
Division Multiple Access (TDMA) system. A microprocessor (21) determines the
frequency to be transmitted in a particular broadcast frame. A dual port random
access memory (RAM) (25) provides an interface between the microprocessor and a
time division multiplex bus (40) so that the time slots are mapped to addresses in the
memory. A plurality of transceivers (50-53) coupled to the bus transmits and
receives at different designated frequencies, the transceivers being chosen for
particular users during a particular broadcast frame based on the location in the
memory chosen by the microprocessor.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US239053 | 1994-05-06 | ||
US08/239,053 US5430713A (en) | 1994-05-06 | 1994-05-06 | Frequency hopping in digital cellular networks |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0681377A2 EP0681377A2 (en) | 1995-11-08 |
EP0681377A3 true EP0681377A3 (en) | 1999-01-27 |
Family
ID=22900389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95302824A Withdrawn EP0681377A3 (en) | 1994-05-06 | 1995-04-26 | Frequency hopping in digital cellular networks |
Country Status (3)
Country | Link |
---|---|
US (1) | US5430713A (en) |
EP (1) | EP0681377A3 (en) |
JP (1) | JPH07307716A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL114366A0 (en) * | 1995-06-27 | 1995-10-31 | Powerspectrum Technology Ltd | Apparatus and method for minimizing interference in the fringe areas of communication systems |
FR2739740B1 (en) * | 1995-10-06 | 1997-12-26 | Cofira Etudes Et Gestion | INTERBAND FREQUENCY HOPPING METHOD IN A CELLULAR RADIO COMMUNICATION SYSTEM WITH MOBILE STATIONS, AND CORRESPONDING STATION |
US6243565B1 (en) | 1996-06-18 | 2001-06-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for transmitting communication signals using frequency and polarization diversity |
US6006075A (en) * | 1996-06-18 | 1999-12-21 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for transmitting communication signals using transmission space diversity and frequency diversity |
CN1157869C (en) * | 1997-03-19 | 2004-07-14 | 西门子公司 | Method and switching system for producing telecommunications links |
AU1447400A (en) * | 1998-10-15 | 2000-05-01 | Airnet Communications Corporation | Baseband frequency hopping utilizing time division multiplexed mapping between aradio transceiver and digital signal processing resources |
US7567620B2 (en) * | 2004-06-30 | 2009-07-28 | Texas Instruments Incorporated | Data transmission scheme using channel group and DOCSIS implementation thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5081641A (en) * | 1990-02-06 | 1992-01-14 | Motorola, Inc. | Interconnecting and processing system for facilitating frequency hopping |
US5224121A (en) * | 1992-06-04 | 1993-06-29 | Motorola, Inc. | Rolling synthesizer method for baseband slow frequency hopping |
US5263047A (en) * | 1992-07-02 | 1993-11-16 | Motorola, Inc. | Multiple cavity tuning of a transmitter output in a communication system |
EP0590412A1 (en) * | 1992-09-28 | 1994-04-06 | Siemens Aktiengesellschaft | Bussystem for communication and control in a mobile radio base station |
US5307371A (en) * | 1990-11-15 | 1994-04-26 | Telenokia Oy | Radio transceiver system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4675863A (en) * | 1985-03-20 | 1987-06-23 | International Mobile Machines Corp. | Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels |
IT1230400B (en) * | 1989-06-15 | 1991-10-21 | Italtel Spa | BASE RADIO STATION FOR A DIGITAL RADIO SYSTEM USING THE FREQUENCY HOPPING TECHNIQUE. |
SE470078B (en) * | 1992-03-27 | 1993-11-01 | Ericsson Telefon Ab L M | Base station for cellular frequency hopping TDMA radio communication systems |
-
1994
- 1994-05-06 US US08/239,053 patent/US5430713A/en not_active Expired - Lifetime
-
1995
- 1995-04-26 JP JP7124510A patent/JPH07307716A/en active Pending
- 1995-04-26 EP EP95302824A patent/EP0681377A3/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5081641A (en) * | 1990-02-06 | 1992-01-14 | Motorola, Inc. | Interconnecting and processing system for facilitating frequency hopping |
US5307371A (en) * | 1990-11-15 | 1994-04-26 | Telenokia Oy | Radio transceiver system |
US5224121A (en) * | 1992-06-04 | 1993-06-29 | Motorola, Inc. | Rolling synthesizer method for baseband slow frequency hopping |
US5263047A (en) * | 1992-07-02 | 1993-11-16 | Motorola, Inc. | Multiple cavity tuning of a transmitter output in a communication system |
EP0590412A1 (en) * | 1992-09-28 | 1994-04-06 | Siemens Aktiengesellschaft | Bussystem for communication and control in a mobile radio base station |
Also Published As
Publication number | Publication date |
---|---|
EP0681377A2 (en) | 1995-11-08 |
JPH07307716A (en) | 1995-11-21 |
US5430713A (en) | 1995-07-04 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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AK | Designated contracting states |
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PUAL | Search report despatched |
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17P | Request for examination filed |
Effective date: 19990716 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 20020416 |